James b



(No Model.)

J. B. RYAN.

BBD BOTTOM.

No. 480,282. Patented Aug. 9, 1892.

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UNITED ST TES PATENT OFFICE.

JAMES B. RYAN, OF NEV YORK, N. Y.

BED-BOTTOM.

SPECIFICATION forming part of Letters Patent No. 480,282, dated August 9, 1892.

Application filed May 26,1890- Serial No. 353,149. (No model.)

To all whom iv' may concern,.-

Be it known that I, JAMES B. RYAN, a citizen of the United States, residing in the city of New York, State and county of New York, have invented a new and useful Improvement in Bed-Bottoms, of which the following is a true and full description, enabling others skilled in the art to which pertains to make the same.

My invention relates to bed-bottoms, and particularly that class of bed-bottoms made of woven-wire or other fabric stretched upon a frame and supported by coiled or spiral springs.

It consists of a means whereby the central portion of the woven-wire or other fabric is strengthened and the sides or selvage prevented from becoming loose or sagging'. I eifect this by the means illustrated in the accompanying drawings, in which like letters refer to like parts in each.

Figure l is a perspective view of a bed-bottom with the device. Fig. 2 is a plan View of the device.

Fig. l represents a -perspective view of a bed-bottom with my device in position. A is the woven -wire fabric stretched upon the main frame B and supported by the transverse rows of springs O. D D are bars, preferably of steel, which cross the woven-wire fabric diagonally, forming a loose contact at Dand connected at their ends with the barE. The bars E extend farther than the connectingpoints e e, but are preferably loosely connected at the points e c. The bars D D eX- tend entirely across the woven-wire fabric, their terminals coming in Contact with the selvage, but not attached to it, on both sides of the same, and also being in contact with the bars E E-that is to say, the ends of the bars D may simply rest upon the selvage-bar E, as at the points c c. I iind in actual practice that this method answers; but they may be loosely tied, by which is meant that when a pressure is exerted upon the center of the frame at D', which causes the selvage of the fabric to draw in, the centers D of the diagonal bars not being-riveted or iirmlyconnected, adjust themselves by a sliding motion to the inequalities of pressure at point D,.and being loosely tied or merely resting upon the selvage-bars, they also adjust themselves to the unequal pressure by a movement along the bars E. When the pressure is removed, the central spring under the bars at the point D resumes its normal condition, forcing the X- frame iirmly against the wire fabric, and the bars extending to the selvage carry the woven wire up with them. The integrity of the surface is in this manner maintained. But one spring is essential to operate this frame, and this, as stated farther on, is located under the spot where the diagonal bars cross each other. I preferably, however, use a row of springs. The other row of springs merely support the fabric in the manner usual with this kind of bed-bottom. They are not essential to the workings o f my frame. They maybe used or dispensed with without affecting' my claims.

The shape of the bars may be fiat, or round, or any other shape. No limit as to the length of the selvage-bars E is proposed; but they must not extend the whole length of the selvage. rlhe points F F show about how they should be to produce the best result. These bars are connected to the selvage loosely, either by tying or by passing themvthrough enough coils of the selvage to secure them in position.

I am aware that strengtheningbars have been used to attain the ends for which this device is constructed, but have no knowledge of their being placed as shown in this device. I am also aware of the many defects which exist in most of them, especially those which are riveted to the selvage. These rivets are the first to give way and fracture the selvage, which then presents a ragged surface of steel points. For this reason I prefer a loose connection with the selvage-bar.

In the drawings I have shown the springs runningtransversely; but I may arrange them so as to follow the direction of the diagonallyplaced bars. It is desirable, however, that one of the springs comes directly under the point of junction D as nearly as possible in the center of the woven-wire fabric of the bed-bottom frame at the point D.

The bars D and E pass under the wovenwire fabric to which they are attached. The method of placing the device on a bed-bottom with three rows of transversely ranging springs, as shown, is to have the bars E rest 011 the selvage with the ends F resting upon the tops of the two outer rows of springs and IOO the center, as at E', resting on the center'row of springs. A uniform pressure is thus obtained on all points, which is distributed over the entire central portion of the Ibed-bottom where the greatest strain is always exerted.

Having thus stated the nature of my device,whatI claim as new, and desire to secure by Letters Patent, is

1. In a bedbottom consisting of a main frame with woven wire or other fabric stretched between its ends and supported by one or more rows of springs, the diagonallyplaced bars D, extending across the wovenwire or other fabric and under the same and between the fabric and the terminal coil of the central spiral spring, as herein described and set forth.

placed bars, as herein described and set forth.

JAMES B. RYAN.

Witnesses:

HOWARD COX, WILLIAM G. BLACK. 

